VirtualDub 1.6.4 is out on SourceForge. It has some general cleanup of issues in 1.6.3, and more importantly, thanks to some persistant users has a couple of critical fixes for Windows 95/98/ME users -- a GDI handle leak fix, and a GDI region double-free fix. It also has a workaround for the capture problems on the SAA713x-based boards. There are still some issues; video timing becomes wonky when audio playback is enabled, and for some reason the tuner has a habit of randomly dropping out of the crossbar, but at least basic capture should work.
Product page: here